Answer:
The correct answer is option B i.e. 'Three students were chosen by the committee to attend Science Camp'.
Step-by-step explanation:
The given sentence 'The committee chose three students to attend Science Camp' is given in active voice. Here the subject 'the committee' is performing the action of choosing three students for science camp.
Now, to convert the given sentence into passive voice, we need to make the object (three students) the subject of the sentence. And the original subject (the committee) will be preceded by the preposition 'by'.
Hence, the original object (three students) now receives the action 'of being chosen' by the original subject (the committee).
Active voice - The committee chose three students to attend science camp.
Passive voice - Three students were chosen by the committee to attend science camp.